diff --git a/contrib/pngnq.diff b/contrib/pngnq.diff
index e6a2737..f4c058c 100644
--- a/contrib/pngnq.diff
+++ b/contrib/pngnq.diff
@@ -1,41 +1,94 @@
-57a58
->    -o Specify output filename. Disables -e and -d options\n\
-110c111
-< static int pngnq(char* filename, char* newext, char* dir,
----
-> static int pngnq(char* filename, char* newext, char* dir, char* outname,
-122a124
->   char *output_file_name = NULL;
-135c137
-<   while((c = getopt(argc,argv,"hVvfn:s:d:e:g:Q:"))!=-1){
----
->   while((c = getopt(argc,argv,"hVvfn:s:d:e:g:Q:o:"))!=-1){
-184a187,189
->     case 'o':
->       output_file_name = optarg;
->       break;
-211c216
-<     retval = pngnq(input_file_name, output_file_extension, output_directory,
----
->     retval = pngnq(input_file_name, output_file_extension, output_directory, output_file_name,
-433c438
-< static int pngnq(char* filename, char* newext, char* newdir, 
----
-> static int pngnq(char* filename, char* newext, char* newdir, char* outname,
-437d441
-<   char *outname = NULL;
-474,475c478,481
-<   { 
-<     outname = createoutname(filename,newext,newdir);
----
->   {
->       if (!outname) {
->         outname = createoutname(filename,newext,newdir);
->       }
-673,678d678
-<   /* Clean up file name */
-<   if(outname){
-<     free(outname);
-<     outname = NULL;
-<   }
-< 
+--- pngnq-1.0/src/pngnq.c	2009-05-20 13:04:15.000000000 +0100
++++ pngnq-1.0-mod/src/pngnq.c	2010-08-31 17:03:55.000000000 +0100
+@@ -55,6 +55,7 @@
+    -s Speed/quality: 1 = slow, best quality, 3 = good quality, 10 = fast, lower quality.\n\
+    -g Image gamma. 1.0 = linear, 2.2 = monitor gamma. Defaults to 1.8.\n\
+    -e Specify the new extension for quantized files. Default -nq8.png\n\
++   -o Specify output filename. Disables -e and -d options\n\
+    -d Directory to put quantized images into.\n\
+    -v Verbose mode. Prints status messages.\n\
+    -V Print version number and library versions.\n\
+@@ -107,7 +108,7 @@
+ static mainprog_info rwpng_info;
+ 
+ 
+-static int pngnq(char* filename, char* newext, char* dir,
++static int pngnq(char* filename, char* newext, char* dir, char* outname,
+ 		 int sample_factor, int n_colors, int verbose,  
+ 		 int using_stdin, int force, int use_floyd, double force_gamma);
+ 
+@@ -120,6 +121,7 @@
+   char *input_file_name = NULL;
+   char *output_file_extension = "-nq8.png";
+   char *output_directory = NULL;
++  char *output_file_name = NULL;
+ 
+   int using_stdin = FALSE;
+   int c; /* argument character */
+@@ -132,7 +134,7 @@
+   double force_gamma = 0;
+ 
+   /* Parse arguments */
+-  while((c = getopt(argc,argv,"hVvfn:s:d:e:g:Q:"))!=-1){
++  while((c = getopt(argc,argv,"hVvfn:s:d:e:g:Q:o:"))!=-1){
+     switch(c){
+     case 's':
+       sample_factor = atoi(optarg);
+@@ -182,6 +184,9 @@
+     case 'e':
+       output_file_extension = optarg;
+       break;
++    case 'o':
++      output_file_name = optarg;
++      break;
+     default:
+       fprintf(stderr,PNGNQ_USAGE);
+       exit(EXIT_FAILURE);
+@@ -208,7 +213,7 @@
+    
+     PNGNQ_MESSAGE("  quantizing: %s \n",input_file_name);
+ 		
+-    retval = pngnq(input_file_name, output_file_extension, output_directory,
++    retval = pngnq(input_file_name, output_file_extension, output_directory, output_file_name,
+ 		   sample_factor, n_colours, verbose, using_stdin,force,use_floyd,force_gamma);
+ 
+     if(retval){
+@@ -430,11 +435,10 @@
+ #endif
+ }
+ 
+-static int pngnq(char* filename, char* newext, char* newdir, 
++static int pngnq(char* filename, char* newext, char* newdir, char* outname,
+ 		 int sample_factor, int n_colours, int verbose, 
+ 		 int using_stdin, int force, int quantization_method, double force_gamma)
+ {
+-  char *outname = NULL;
+   FILE *infile = NULL;
+   FILE *outfile = NULL;
+ 
+@@ -471,8 +475,10 @@
+     outfile = stdout;
+   }
+   else
+-  { 
+-    outname = createoutname(filename,newext,newdir);
++  {
++      if (!outname) {
++        outname = createoutname(filename,newext,newdir);
++      }
+ 
+     if (!force) {
+       if ((outfile = fopen(outname, "rb")) != NULL) {
+@@ -670,12 +676,6 @@
+     row_pointers = rwpng_info.row_pointers = NULL;
+   }
+ 
+-  /* Clean up file name */
+-  if(outname){
+-    free(outname);
+-    outname = NULL;
+-  }
+-
+   return 0;
+ }
+